One More Flight,
Being rather uncommon, micro papillary bladder cancer (MPBC) information can only be drawn from a small pool of original investigation. The following is based on the 2016 article linked below. It is heavy on small sample statistics, followed by understandable summaries.
Frequently noted in articles about MPBC is a "poor outcome". That statement requires a bit of explanation. If the comparison is made between "all" cases of bladder cancer and "just MPBC", the statement is supported. However, if "all" and "just MPBC" are compared based on Stage and Grade, the overall survival stats are nearly identical.
MPBC is generally detected a later stage than general bladder cancer; there in lies the explanation for the misunderstanding. T1 or T2 MPBC can not be compared with other forms of T0 bladder cancers.
MD Anderson is frequently cited as the largest reporter on MPBC treatment and outcome.
It is my impression that authors do the public a disservice when the outcome of rare forms of bladder cancer are describe as having "poor outcomes" without explaining the reasoning.
See table 2 "Overall Survival" for an apples to apples comparison.
Everyone, with aggressive advanced bladder cancer of any etiology, should be seeking the best treatment and outcome possible There is no benefit to being told that a particular variant is worse than others. Be prepared to seek the best advice available.
"Micropapillary Bladder Cancer: Insights from the National Cancer Database"
www.ncbi.nlm.nih.gov/pmc/articles/PMC5181670/
Best,
Jack